title: Do educational methods affect students' ability to remove artificial carious dentine? A randomised controlled trial.
abstract: This trial aimed to evaluate the influence of two educational methods on students' ability to remove artificial carious dentine. Traditional lecture and lecture plus a live demonstration of artificial carious tissue removal were compared in a blind two-parallel-group design. Twenty-six students were randomly divided into two groups, and their skills were evaluated according to the following criteria: time spent on the dentine excavation procedure (in min), students' perceived confidence in conducting the procedure (graded assessed on a scale from 0 to 10), and the outcome of artificial carious tissue removal, evaluated by measuring the residual dyed artificial carious dentine layer (in μm). Statistical analyses were carried out using a t-test to compare the students' confidence and time spent on the procedure, and a two-way ANOVA was used to compare residual artificial decayed dentine with educational methods and tooth region (incisal, medium, and cervical thirds) as factors. There were no differences between the methods regarding excavation time (P = 0.898) and students' confidence (P = 0.382). The residual artificial carious dentine results showed that the educational method (P < 0.001) and cavity region (P < 0.001) were statistically significant, as was their interaction (P = 0.040). The lecture plus live demonstration group presented the best results for artificial caries removal. Although there were no differences between the two groups for the cervical region, the best results for the lecture plus live demonstration group was in the other two-thirds of the tooth.
authors.affiliation: Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil.
authors.forename: Q F
authors.initials: QF
authors.lastname: Rosa
authors.forename: T M
authors.initials: TM
authors.lastname: Barcelos
authors.forename: M R
authors.initials: MR
authors.lastname: Kaizer
authors.forename: A F
authors.initials: AF
authors.lastname: Montagner
authors.forename: R
authors.initials: R
authors.lastname: Sarkis-Onofre
authors.forename: A S
authors.initials: AS
authors.lastname: Masotti
authors.forename: P S
authors.initials: PS
authors.lastname: Jardim
authors.forename: T
authors.initials: T
authors.lastname: Pereira-Cenci
authors.forename: E F
authors.initials: EF
authors.lastname: Oliveira
authors.forename: M S
authors.initials: MS
authors.lastname: Cenci
mesh_terms: D000704:Analysis of Variance; D002983:Clinical Competence; D003162:Competency-Based Education / Q000379:methods*; D003731:Dental Caries / Q000628:therapy*; D003737:Dental Cavity Preparation / Q000379:methods*; D003804:Dentin; D004497:Education, Dental / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male
chemical_list: C093073:Demineralized Dentin Matrix
keywords: caries detection; caries removal; competency-based education; demineralised dentine matrix; dental caries; dental decay; dental education; tooth demineralisation